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EFI updates for 3.7

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Fix oops with EFI variables on mixed 32/64-bit firmware/kernels and
 document EFI git repository location on kernel.org.
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Merge tag 'efi-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent

Pull EFI fixes from Matt Fleming:

 "Fix oops with EFI variables on mixed 32/64-bit firmware/kernels and
  document EFI git repository location on kernel.org."

Conflicts:
	arch/x86/include/asm/efi.h

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2012-10-26 10:17:38 +02:00
commit 8b724e2a12
4 changed files with 24 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
MAINTAINERS
View file

@ -2802,6 +2802,7 @@ F: sound/usb/misc/ua101.c
EXTENSIBLE FIRMWARE INTERFACE (EFI)
M: Matt Fleming <matt.fleming@intel.com>
L: linux-efi@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git
S: Maintained
F: Documentation/x86/efi-stub.txt
F: arch/ia64/kernel/efi.c

1
arch/x86/include/asm/efi.h
View file

@ -98,6 +98,7 @@ extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
extern int efi_memblock_x86_reserve_range(void);
extern void efi_call_phys_prelog(void);
extern void efi_call_phys_epilog(void);
extern void efi_unmap_memmap(void);
extern void efi_memory_uc(u64 addr, unsigned long size);
#ifndef CONFIG_EFI

12
arch/x86/kernel/setup.c
View file

@ -1049,6 +1049,18 @@ void __init setup_arch(char **cmdline_p)
arch_init_ideal_nops();
register_refined_jiffies(CLOCK_TICK_RATE);
#ifdef CONFIG_EFI
/* Once setup is done above, disable efi_enabled on mismatched
* firmware/kernel archtectures since there is no support for
* runtime services.
*/
if (efi_enabled && IS_ENABLED(CONFIG_X86_64) != efi_64bit) {
pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
efi_unmap_memmap();
efi_enabled = 0;
}
#endif
}
#ifdef CONFIG_X86_32

18
arch/x86/platform/efi/efi.c
View file

@ -70,11 +70,15 @@ EXPORT_SYMBOL(efi);
struct efi_memory_map memmap;
bool efi_64bit;
static bool efi_native;
static struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
static inline bool efi_is_native(void)
{
return IS_ENABLED(CONFIG_X86_64) == efi_64bit;
}
static int __init setup_noefi(char *arg)
{
efi_enabled = 0;
@ -420,7 +424,7 @@ void __init efi_reserve_boot_services(void)
}
}
static void __init efi_unmap_memmap(void)
void __init efi_unmap_memmap(void)
{
if (memmap.map) {
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
@ -432,7 +436,7 @@ void __init efi_free_boot_services(void)
{
void *p;
if (!efi_native)
if (!efi_is_native())
return;
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
@ -684,12 +688,10 @@ void __init efi_init(void)
return;
}
efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
efi_native = !efi_64bit;
#else
efi_phys.systab = (efi_system_table_t *)
(boot_params.efi_info.efi_systab |
((__u64)boot_params.efi_info.efi_systab_hi<<32));
efi_native = efi_64bit;
#endif
if (efi_systab_init(efi_phys.systab)) {
@ -723,7 +725,7 @@ void __init efi_init(void)
* that doesn't match the kernel 32/64-bit mode.
*/
if (!efi_native)
if (!efi_is_native())
pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
else if (efi_runtime_init()) {
efi_enabled = 0;
@ -735,7 +737,7 @@ void __init efi_init(void)
return;
}
#ifdef CONFIG_X86_32
if (efi_native) {
if (efi_is_native()) {
x86_platform.get_wallclock = efi_get_time;
x86_platform.set_wallclock = efi_set_rtc_mmss;
}
@ -844,7 +846,7 @@ void __init efi_enter_virtual_mode(void)
* non-native EFI
*/
if (!efi_native) {
if (!efi_is_native()) {
efi_unmap_memmap();
return;
}